providers/docker: check proper state for docker-logs [GH-3990]

CHANGELOG.md

@@ -8,6 +8,7 @@ IMPROVEMENTS:
 BUG FIXES:
 
   - core: Fix cases where sometimes SSH connection would hang.
+  - command/docker-logs: Won't crash if container is removed. [GH-3990]
   - providers/docker: Create args works. [GH-4526]
   - providers/docker: Nicer error if package is called. [GH-4595]
   - providers/docker: Host IP restriction is forwarded through. [GH-4505]

plugins/providers/docker/command/logs.rb

@@ -43,7 +43,7 @@ module VagrantPlugins
                 next
               end
 
-              state = machine.state
+              state = machine.state.id
               if state == :host_state_unknown
                 machine.ui.output(I18n.t("docker_provider.logs_host_state_unknown"))
                 next